Electrical Machines
Due to magnetic saturation, the flux per pole in a DC machine without brush shift

  decreases in both generators and the motors with load.
 increases in generators but decreases in motor with load.
 increases in both the generators and the motors with load.
 decreases in generators and increases in motor with load.

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Electrical Machines
In a DC machine

 emf in armature conductors and at the terminals is alternating.
 current and emf in armature are alternating.
 current and emf in armature are unidirectional
 current and emf at the terminals are alternating.

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